Fundamental DNS records you should know.
DNS records explained.
DNS records set specific rules in a DNS zone. They are entirely made of text, which makes them very light. Zone files are the place where the various types of DNS records are stored.
Every time when a user makes a request, the DNS servers are searching for a particular DNS record type. As a result, there are many different records for the various kinds of requests that could be made. So, let’s make things a little bit more precise and explain some of the most fundamental DNS records.
When we are talking about DNS, the first record that we should mention is the A record. Its purpose is very important and is at the foundation of DNS. The A record points a domain name/hostname to the corresponding IP address. So, for example, when a user makes a request to visit a website, it would typically type the website’s domain name. However, to find it, the user needs its IP address. To get it, the browser will search from one DNS server to another. So, in the end, it will receive the A record capable of resolving the query. The browser will know where exactly the website is and is going to load it.
SOA stands for the start of authority record. Its purpose is to show the primary DNS server – the authoritative name server. This record also holds essential information for the DNS zone, also for the normal functionality of the DNS network, it is a necessity. Within the data inside can be found, also who is the administrator responsible for it, how frequently the DNS server has to refresh, and more.
This record is also known as the mail eXchanger record. The purpose of it is also very important, especially when you want to have accurate email correspondence. It displays the server or servers accountable for receiving emails for the domain. In case you don’t have such a DNS record, the email correspondence is going to be challenging. The sending servers won’t know to who they should send messages. As a result, you are not going to receive emails.
Domain owners sometimes neglect this DNS record, but for sending emails without any problems is a necessity. The PTR record is also known as a pointer record. Its purpose is the opposite of the A record, and it is required for Reverse DNS. The main function is to point an IP address to a domain name. Its common use is for sending emails. The receivers need to verify that the email was sent from the actual domain, not from somebody else. If the A and PTR records are not configured correctly, your emails will end in the spam folder. Also, it is able to operate with both IPv4 addresses and with IPv6 addresses.
The CNAME record is showing which is the actual, canonical domain name for the domain/subdomain you want to visit. This DNS record is essential to know when we are speaking for subdomains. Creating a CNAME for each of them and pointing them to the domain name makes administrating more simple. You don’t have to modify any further DNS records for every subdomain. For example, if you make changes, for example.com, there is no need to update these changes for subdomain.example.com. For you, DNS management will be much easier.
Suggested article: Most frequently used DNS commands.
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